Quad Differential Line Driver

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iC-HD is a robust line driver for industrial 5 V and 24 V applications with four complementary output channels.

For signal lines with a characteristic impedance of 30 to 140 Ω  the integrated line adapter, optimized to 75 Ω , minimizes ringing effects which arise when there is no line termination.

At a supply of 24 V the push-pull driver stages typically provide 200 mA to discharge the line and also have a low saturation voltage (of typically 200 mV with a 40 mA low-side load). The outputs are current limited and short-circuit-proof, shutting down with excessive temperature.

For bus applications the driver stages can be switched to high impedance by a high at input NEN. The driver stage inputs have a Schmitt trigger characteristic and are compatible with CMOS and TTL levels.

The device recognizes undervoltage at voltage regulator output VREF and thus indirectly also at supply voltage VB. VREF acts as a 5 V voltage supply for external loads of up to 5 mA.

Excessive temperature and undervoltage are signaled as an error by a low signal at the short-circuitproof NERR output. For test purposes the temperature monitor can be deactivated by applying a voltage of greater than 12 V to input NEN.

The iC-HD contains internal ESD protection circuitry.

iC-Haus iC_HD2TSSOP20_001

• Line drivers for 24 V control engineering
• Linear scales and encoders
• Sensor systems

Symmetry Electronics (and its e-commerce division: SemiconductorStore.com) is an authorized iC-Haus distributor.


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Complementary short-circuit-proof push-pull driver stages for RS422 and 24 V applications up to 2 MHz
Pin-compatible to xx2068
Integrated line adaptation for high signal quality at 24 V
Moderate slew rate reduces EMI
High driving capability of typically 200 mA at 24 V
Output saturation of just 0.3 V at 40 mAdc
Tristate function with excessive temperature
Error messaging with excessive temperature and undervoltage
TTL-/CMOS-compatible Schmitt trigger inputs, voltage-proof to 40 V
Tristate function for bus applications
Integrated 5 V voltage regulator for 5mA
4.5 to 35 V single supply operation with low static power dissipation
Operating temperature from -25 to 125 C (-40 C is optional)

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Quad Differential Line Driver
Part #: IC-HD2TSSOP20ET-40/125
Quad Differential Line Driver